Coal drill or boring machine



April 26,1927.

1,626,568 w. J. THoMAs COAL DRILL 0R BORING MACHINE `Filed Feb. 24. 1926 2 Sheets-Sheet 1 xNyENToR ATTORNEY W. J. THOMAS April 26,1927. 1,626,566

COAL DRILL 0R BORING MACHINE Filed Feb. 24. 1926 2 Sheets-Sheet 2 v INVENTOR ATTORNEY Patented Apr. V26, 1927.

WILLIAM vJAMES, THOMAS; or coviiRnALia,` PENNSYLVANIA.

'COAL DRILL on BORING MACHINE.

Application kfiled February 24, 1926. Serial-No. 90,383.

This invention relates to a boring machine designed for use in mi nes,.tunnels and the like, the general object of the invention heing to provide a single post for holding the drilling device, the post beingadjustable as to length and having means for clamping `it between the top and bottom walls of the tunnel or mine, with means for reversing the screw shaft which carries the drill so that it is not necessary to back up the shaft to reset it after it has been fed its length through the nut member.

Another object of the invention is to provide means for adjusting the nut carrying member on the post so that a plurality of holes may be bored without removing the post. f

This invention alsoV consists in certain other features of construction and in the combination and arrangement of the several parts,'to be hereinafter full y described, illustrated in the accompanying drawings and specifically `pointed out in the appended claim.

In describing my invention in detail, reference will be had to thev accompanying drawings wherein like characters denote like or correspondingl parts throughout the severalY views, and in which Figure 1 is a view showing the device in use. f

Figure 2 is a plan view of the device.

Figure 8 is an edge view thereof.

Figure 4 is a section on line 4 4 of Figure 1.

Figure 5 is a section on line 5*-5 of Figure 4.

Figure 6 is a detail view, partly in section, showing the means for connecting the screw shaft with the bit.

In these views, A indicates the supporting post of the d-evice which is composed of the two sections 1 and 2 which are slidably connected together by the sockets 3, one of which is carried at one end of each section and receives the opposite section. Each section is provided with a plurality of holes 4 so that the sections can be fastened together in adjusted position by the bolt .5 and its wing nut 6 and also'hy a threaded stud 7, on a bracket 8, and its wing nut 9. The stud also permits the bracket to vbe rotated when the nut is loosened.

The lower end of the member 1 is formed with a point 10 so that it will penetrate the .floor yof the tunnel or mineyas shown iin .Figur-e 1, and a horizontal arm; 11 is fastened to .the upper end of the sect-ioni) and has a threaded hole therein to receive a threaded shaft 12 which is provided with a pointed end to penetrate the ceiling ofthe mine. This sha-ft is provided with a handle 13 so' that it can be rotated.

The bracket 8 is provided with a threaded hole 14 which is engaged by a screw shaft 15, each end of which is provided with a reduced part 16 of square shape in cross section. The shaft is adapted to be turned by a handle 17 which is providedwith a plurality of square holes 18, Vany one of which is adapted to receive a square part 16 of the shaft so that the handle can be adjusted on the shaft. A coupling` 19, hav-V ing a square bore, is Aprovided for connecting one of the reduced parts 16 with the drilling bit 20, which is provided with a square part 21 to engage the bore of the coupling. This part 21 is of considerable length so that the coupling can be moved over the same to permit the shaft and bit to be placed in alignment and then the coupling is Ymoved over the reduced part 16 of the shaft to connect the parts together.

It will be seen that Ywhen the shaft 15 has been turned until-.fone end nears the post, it is simply necessary to loosen the screw 9, move the coupling 19 on to the shank 21 of the drill and remove the handle land then rotate the bracket 8 on its pivot formed by theV stud 7 and thus reverse the sha-ft, as shown by the arrows in Figurey 1. Then .the handle is placed `on the reduced part 16 which isopposite to that part which the handle engagedbefore, place a longer bit in the hole and then couple this bit with the shaft. Then the drilling can be resumed. By this arrangement, it is not necessary to unscrew the shaftv By placing the stud 7 in different pairs of holes 4f.

in the post A, a number of the holes can be drilled in the tunnel head without mov- 1 ing the post. By making the post telescopic, it can ybe set up in tunnels of varying heights. j

Itis thought from the foregoing description that the advantages and novel vfeatures of my invention will be readily apparent. I desire it to be understood that I may make changes-in the construction and in the combination and arrangement of the several g3 f Y 41,626,568

,parvts, providedthat suohchanges fall Within the scope of the appended ela-im.

What I claim isz; A boring machine comprising a telescopic upright, means or holding the parts of the uprightk in adjusted position, mea-ns for clamping` the upright between the floor and ceiling of a tunnel, a bracket having athreaded hole therein, means for rotatably connecting the bracket With the upright, such means also permitting Vertical Yadjusltnlent of the bracket. on the upright,

a screw shaft engaging the threaded hole `V in the bracket, said shaft. having each end square, a 'handle havngsqnare holes therein for receiving either end oi' the shaft, a blt .having a square stem and a, coupling havmg a square bore for fitting over the Stem of the drill and either Square end of.

the screw shaft. Y In testmiony Whereollr I ai'x my s1gnature,

WILLIAM JAMES THOMAS. 

